I wouldn't necessarily call it Somewhat Practical, but more along the lines that it would be impossible for most (if not all) real humans to pull off wearing tights with enough muscle mass to be on steroids & still be able to act.
The only characters that can pull off wearing tights IMO is probably Spider-Man, Superman, & anyone else who looked lean while wearing tights. Because those characters never needed massive muscles to define who they are in any shape or form.
If Marvel ever gets X-Men back I would only expect their outfits get the same quality of treatment like Captain America's outfit did in Avengers.