Notice I said suspension components too? Go back and read what I actually said.
If you run the same wheel rate and cheap shocks with your 17’s as you did with your 14’s you get a crappy ride because yes, you’ve changed how those tires grip the road and how much shock absorbing capacity the tires have.
But you know, if you improve the shock absorbing capabilities of the SHOCK ABSORBERS then you don’t need to have that issue.
So exactly as I said, people that say that larger diameter wheels cause a harsh ride are just directly advertising they don’t understand the physics of suspension or even basic suspension tuning.
The most basic concept of suspension is that it’s to keep the tires in contact with the road. If you change how the tires interact with the road by changing their profile and compounds, you have to make changes to the suspension (and alignment). It’s that simple.