If you're suggesting that every player joins the server and just starts with the current max health. armor, and runspeed, I can't get behind that. Like Scribbles says above, there's a sense of progression there. I know that when I first joined the server, getting on and grinding those active hours (my first battalion was Shock and I couldn't AFK) gave me a real sense of accomplishment. The other points he made were all fair too.
-1 To be honest, the only reason I see to remove the skill points system would be the implementation of a complex system wherein you level up stats over time by performing actions. Die a lot? Well, you're more resistant to death! Shoot a lot? Well, you're a bit more accurate, you reload faster! Run a lot? Well, you can run faster, and for longer distances! But nah, gmod isn't Tarkov sadly.