This is true.
But you're still a turd.
Thats ok, I have thick skin. We have had a flood of teens in the gym where i go lately and all they want to do is arms, arms, arms, arms.
Most of these clown never touch the leg press or squat rack. To make matters worse, these dorks will come up to me and be like "yo bro - I'm going to Vitamin Shoppe tommorow what should I get?" They are all on the cell phones, loafing around, terrible gym ettiquette, rude, weak as shit, etc.
I tell them to see me at 8pm on Friday at the gym and I will tell them. No one ever shows up. The key, for the long run, is basic exercises. Incline Bench, Squat, Military, Deads, etc.
Once you hit over 30 years old, if you dont have a good foundation - you are done. I see this all the time - dudes with a decent upper body - no legs, no cavles or hams, and cant really do much and get injured alot.
Bottom line - for the long haul - basics and caveman workout is what works for size, power, strength, and endurance.