Fighting game inputs aren't that hard, anyone who says they are a huge barrier for just starting out to play the game just doesn't want to bother trying to understand how simple they really are.

All the newer fighting games are also a lot more beginner friendly, some even have 1 button specials.

Personally, I feel 1000 times more frustrated with a shooter, because I can't go into training mode or replay after I lose, look at what killed me and find out "this is how I can beat it", because the answer 80% of the time is just that the other guy simply has better aim or a better screen with a higher refresh rate, so is not like I'm doing shit wrong, I just don't have 30 years of shooting games muscle memory.

Fighting games are more about knowledge, someone who knows simple concepts as blocking low / high, throwing to beat blocking, jumping to beat throws and anti-airing to beat jumping can beat any player that knows how to do special moves but has no fundamentals, without doing any special or combo themselves.