I mean, no, and even if it was the case, endgame activities that are done in a group should be rewarding.
Delves lack any need for optimization as there are no damage checks, have minimal mechanics if any, and have bosses that range from mildly threatening (waxface) to toothless (basically every nerubian boss) to literally absent (experiments has no boss fight). The only mild threats that exist are T9 and up Zekvir Lieutenants, of which there is only ever 1 pack. They simply don’t have any difficulty near what Myth track comes from.