It's not hard in my experience. Not as easy as convincing CEO to do two redesigns per year, but not hard.

I work with companies operating at a large scale. Downtime costs $xxx,000/minute.

Developers cost lots of money, improving their productivity by a little bit pays huge dividends.

If the company has big events like Black Friday or Superbowl commercials, keeping the site up during those events is worth paying for.

Many not so big companies spend 6 figures per month in AWS bills.

Lots of work for a backend consultant.