Respectfully, be easy about it and give yourself some needed grace here - the love of gear, it's cool factor, the collect-ability factor, it's fun factor, the curiosity factor etc. have never been synonymous with it's function only. We all know how little gear it takes to be actively gigging. But having a true interest,a keen interest in bass gear or technology etc is as genuine and legit as an interest in anything. It's a familiar dilemma I observe with musicians. Justification of some sort (other than the greatest of all...passion) is required before it can be accepted. It can take a lovely joy-bringing hobby and introduce guilt or negativity of some kind. Particularly if it is measured by skill set or 'work' quantity.
As for the practice and 2 basses, besides the obvious practical reasons - Sometimes, you have one practice in a week so you take the opportunity to play 2 basses (being its going to be a band/live rig environment) to choose from if the feeling strikes. It's smart IMO. It's useful, practical and knowledge gaining to play through your basses in a live setting. Helps you refine. The whole process is cyclical refinement.
I know from experience that one can be a well paid professional musician and have the musicians gear/tools as a hobby. Not the same thing. Related? Yes - but only through association.