So what class specifically? I don’t think it makes sense to go for the max of any weapon, however this question is why people often make use of their respecs. Back in the day it was not uncommon for people to horde their stat points until they were sure how much STR/DEX they would need. It’s also why it’s often recommended to start with a caster class like a Sorc to have end game viable gear ahead of time for melee characters (which I personally think is disappointing that the game drives you to that. I’m okay with having classes excel at certain things, but melee are at a pretty big disadvantage here).
Also keep in mind that you can use other equipped items to reach the stat goals. For instance if you’re a Barb and going to wear Arreats, it provides a massive 20 STR and DEX.
Torches and Annihilus also each provide 10-20 to all stats, which can help out if you think you’ll be able to obtain either or both for your end game.
If Pally, you’re probably going to want to use a shield to take advantage of all the great blocking bonuses and HS he gets, so that limits you to 1H weapons which would be lower str req. You can read guides or look at available unique, set and runeword items to also get a feel for what are the weapons that are best suited to the melee pally build that interests you, and then plan your stat allocation accordingly.
For a Barb you’ll have to decide between dual wielding 1Hs, going 1H and a shield, or 2H, and since he has a dedicated weapons mastery, you’ll want to specialize in a specific weapon type. Often if it is not known what your end game weapon is, you spend skill points in your other skills first, leaving mastery for when you have a better idea of your final weapon options. Some people even throw a single point into several masteries at the very beginning, since the first point gives you a large AR/Damage/DS bump, and then they will respec once they get far enough to know what their final build and gear will be. Again, research into the planned build to see what the item progression path is can give you an idea of how much STR/DEX you may need. For instance IK set Sacred Armor takes a staggering 232 STR and the maul takes 225. Some people like to put a %-req jewel or hel rune in the armor to lower the STR down, so they have more points for vitality. I think last time I made an IK barb I also figured out putting +STR gem in helm ended up giving me more overall life since the points I saved in strength going into vitality in stead was actually more life than putting a Ruby in the helm. The Maul’s native sockets are probably best used to gain IAS (at least if going WW) and/or damage though, so you’re likely in it for at least 225 if you want to go IK. IK is a Hell viable set for Barbs but still can’t really compete with the BiS RW and Unique items though, so I’m by no means suggesting those have to be strength goals for all Barbs.
I’m less experienced with Druids, but same deal. Try to figure out what a good Hell difficulty viable weapon would be, and work towards getting your STR/DEX there. IIRC Druids do get a bonus with Mauls (maybe all mace weapons? But this game is already funny about mace vs. hammer vs. scepter so I never trust my memory), I think speed compared to the other classes? So depending on the type of melee druid that might make sense, but if you’re going for Fury then you may have specific speed considerations for attack frame goals.