The main reason many people still choose WordPress is that it's cheaper upfront. Unfortunately, too many agencies tend not to inform clients about the implications of technical debt (low upfront costs and high service costs later on). Acknowledging the problem of technical debt, it seems that WordPress is simply not worth the trouble - disadvantages outweigh the advantages.
But is the problem of technical debt one that affects everyone who wants to create a website? Aren't many of the websites we see not the kind that need constant updates and changes? Many websites don't need to constantly grow or build upon themselves. Does it make sense to build a website on React when you know you can achieve the same result with WordPress with far less effort?
If you're just creating a small website that's unlikely to change or rarely needs new content, WordPress is almost certainly the better choice. This is especially true if you don't have access to a developer. User-friendliness as well as extensibility are the main reasons why there are now over 18.9% of all websites on the Internet operates.
For all websites that grow organically and value high security standards, React is the right choice.