VPS (even with a super basic CMS ready set up) and managed web hosting with integrated editor are completely different products. If you want to make comparisons,
look at WordPress.com, 1mb.site, Wix, etc.
How so? I can have a preinstalled WordPress with a quality theme such as Astra with Elementor and I am done in less than 5 minutes and $4. It is pure laziness not doing it this way and waste of money/time. Not to mention unreliable as you trust another company not to jack up their price. If a price change happens to a VPS you simply move to another cheap hosting for a $3-5 per month with your own WordPress.