If you want premium support then yes you should be for example: one of my clients spent several hundred thousand a year and has a massive part of their operation dependent on AWS, so they also paid for premium support.

If a business is wholly dependent on a particular vendor and that vendor offers additional support, it seems to behoove the business to pay for the additional vendor support.

It's similar to people who complain that they are losing millions of dollars because they can't get Azure support to work with them, but then when asked if they have contacted their account rep confess they don't have an account manager to help them.

Basically paying for additional support is like insurance, you probably won't need it, but if you do you'll be glad you have it.