How accurate is this advice?

every decent intermediate+ strength routine has 2 volume days and 1 strength day. enough to get swole in addition to getting stronger

Calf raises are GOAT for forearm gains.

I think it's good advice.

It's good advice but as you can tell lacks definition and possible accessory work would be helpful in achieving and I'm going to use the word...TONE.

Strength > Aesthetics

You can do more with strength and achieve aesthetics than the other way around.