Well not quite comfortably. If you donāt build that opening bunker one zealot or stalker can kill you and surviving any Protoss all ins are very tricky. So the build order that you have to follow is very strict.(and yeah terrans are getting quite good at it)
But I do understand what you are saying about the harassment. With marines and medivacs/liberators/widowmines etc you can always fly away and come back later. Canāt do that with Zealots. You warp them in and they canāt get out so they have to do damage.
And its really easy to kite them off before charge kicks in, which makes for an unreliable way to harass in the early game. WM can do 10+ kill early on!