Customer support is very important.
Hosts need their customers to keep buying products from them if they want to grow in size and revenue.
It doesn't matter how many new customers you get, if you existing customers start leaving.
Even is you are OK with your current host, unless you trust that they are there to help you when things go wrong, you might be likely to look elsewhere for that next big project.
On the other hand you cannot spend hours helping people with $2 accounts for hours each month. As you will soon be out of business.