personnally I’m not interested in slap things, I’ve always found it sounds too demonstrative. I much prefer more direct and efficient bass lines. but also it depends a lot on the different styles of music, and the ones I’m listening to are not prone to slap at all.
that said, I always think that the more playing techniques you know, the widest is your expression range with your instrument. That’s why I actually learned all the slap lessons, and I’ve recorded one (and only one) cover focused on slap.
and that said, I don’t think it’s a problem if you skip the slap lessons. you do what you want/can and it won’t prevent you from becoming a good bass player in many styles.