What's the opinion about flax seeds here?

Before keto and for many years I m used to eat flax seeds daily but over time I'm start to think about my consumption and think that maybe it's about as eating nothing... I don't really know if any of the omega 3 in it are well converted and I m also not anymore convinced that eating a lot of fiber is good for the body, so I tought I'd stop it... what's your opinion about these kind of stuff, like flax chia and anything like that...