No. Having a limit on how many points you can have is part of the beauty of this system, you can’t max out everything and you have to make sure you invest enough to be competent in every attribute.
Specializing on an attribute (reaching the 5th perk) is not always the best option and it shouldn’t be, if they were simply the best perks everyone would build their characters in order to get them, ignoring the rest of the attributes. Having more points to spend would mean players would take as many 5th perks as they can, making the attribute system basically pointless.
Character customization includes the ability to decide the attributes of your character, but is not as easy as maxing out strenght and start swinging your blade; how much you can carry, how fast it will run out of stamina, how much HP will it get, how fast will it gather materials, everything wile maintaining a competent fighting build. but if you could simply find more points to spend up to maxing out everything, welll they could just get rid of the attributes at all and left us with the same character with the same perks, with the same everything. kinda boring imo.