Tuning 250 Bar max question regarding FX impact

This question really could apply to other similarly rated PCPS, but before I ask it I need to point out I am new to the sport and to PCPS so it may seem ridiculous but here it goes, Why wouldn't it be desirable or be a practical upgrade to add a higher ps. rated regulator in order to increase the fill up ratings on the rifles with lower than 4500 psi fill pressures. It seems that shot count is a universal concern, esp. with larger calibers and if an air gun was able to hold more pressure this would seem to be the obvious result. I know Huma Air makes aftermarket regulators, and if I understand the way the gun operates the only part of the rifle that would be exposed to these higher fill pressures would be from the regulator back. The Carbon fiber bottles can already handle 4500 psi so why wouldn't it make sense to have the bottle filled to its rated max or at least have the option. Nobody says you have to fill it up that high but it would be nice especially with the .35 cal. I currently shoot. This would be harder on the regulator but other brand rifles seem to overcome this. This question would seem to be even more applicable to the Maverick with its 2 regulators to share the burden. 
 
The weak point would be the reg. If the reg can handle 4500 psi and output to 2000-3000 psi then the gun will only see 2000-3000psi. Not sure what huma and fx regulators are rated for. Also those small bottle are rated for 250 bar fill. Not all carbon fiber bottle can handle 4500 psi. If you can replace the fx bottle to a 4500 psi bottle then it should be all good as long as the reg is also rated for 4500psi. Yes high pressure means more shot per fill.
 
I think it is very dangerous and unnecessary.

You do know even 2000 psi is very dangerous yet we all put it right to our cheek right? It anything fails, kaboom. OP was asking why don't company make 4500 psi reg in their gun so it can be fill to 4500 psi. There are some guns out there rated to 4500 psi and no problem. As long as the equipment is rated for it.