This vastly depends on the field you are talking about.
There are absolutely things that are worth doing yourself, so that when they inevitably break you can fix them.
And there are also other things that are absolutely better bought or contracted…
In the end imo it gets down to time, money, and how many times are you going to need to maintain or replace the thing in your lifetime.
To add to this, it is the general term for all non-firearms: so it covers also bludgeons and anything else you swing by hand.
I think that it’s a reasonable license for them to protect their business while continuing to provide full access to the community. The single user would still be able to modify or even build their own clone, but a private company would not be able to just sell a copy.
In an ideal world where money did not exist this would be detrimental to innovation, but in the real world Prusa needs to make money to stay in business. And considering their competitors, I would much prefer them to stay in the business and as much ahead of the competition as possible.
I was specifically called back to be asked about this. It felt so weird because in my country this is not a common question