Yes it is, I have had an argument several times with .ml folks who articulated that voting legitimised the system making you culpable for its shortcomings.
Very common around election season, I think the first time I heard it was actually last midterm in 2022.
Hell there are 3 comments on this post saying don't vote. There's no ambiguity they aren't saying voting isn't enough, in no uncertain terms they are saying don't vote.
Is there an argument to be made that the ratcheting mechanisms of FPTP skew the results towards the lesser of two evils? Absolutely, especially at the presidential level.
Where that is less true is the midterms and municipal elections. We've seen proof that we can have real progressives like Mamdani and we need even more like Abdul El-Sayed. Progressive policy is popular and any movement needs allies.
I'm not saying don't protest, I'm not even going to say do it peacefully but voting still has it's place.