“The purpose of life is to maximize our potential. To be the best we can be.” If by that, you mean love, then I agree with you. If you mean physical fitness, career progression, or something else that is selfish or superficial, then no.
Most of the “coaches” and “gurus” in the “self-improvement” industry heavily lean toward the latter. They sell you on the idea of getting more for yourself, rather than being of greater value to others.
What will truly make you a better person: looking in the mirror every morning and telling yourself how great you are? Or, asking God every morning to continue molding you into a more loving person? And which will be more fulfilling?