you still can write `<html><body><h1>hello world</h1></body></html>`, there is nothing wrong with it! but once you have written a file-browser with an embedded

you still can write `<html><body><h1>hello world</h1></body></html>`, there is nothing wrong with it! but once you have written a file-browser with an embedded editor in it or anything else at more complex level, you will consider using react and all the things. because complex things are complex. again, for simple things you can easily use simple tools - maybe you should. but of course once you are using react day in day out because you need it for other things - you might just use it for anything because you are familiar with it.