That, logically, makes no sense.
If the tire is rated to run upto a certain speed threshold, you have nothing to worry about unless you exceed it.
So, if you plan to regularly drive at triple-digit speeds, make sure to roll on R-rated or better tires.
Upto 130mph? Get H-rated or better.
Upto 155mph? W-rated or above, please.
Don't just take other peoples advice at face value. Understand the logic behind their reasoning, and if THAT makes sense to you, then you may choose to adopt it.
Tire speed rating is correlated with sidewall stiffness.
Rating is assigned after a test where the tire is loaded and pressed over a rotating drum (dynameter style) and then run at ever increasing speeds upto the specified threshold.
What happens if you exceed the speed rating for a length of time?
The sidewall starts flexing too much, which may, eventually, lead to its failure (aka a blow-out).
So don't do that, and you'll be just fine.
V-speed rating is good upto 149mph.
If you can contain yourself to stay below those speeds, you will be perfectly fine.
If your tire shop gets snooty with you (e.g.: 50% of Costco shops), find another one.
HTH,
a