I'd say there's really no reason for the bad blood, and frankly, to me it feels immature at times and ill-informed. You can still use WCs in your framework. Take a look at this: custom-elements-everywhere.com for example.
Another point: Say I'm developing something with Vue, and I want to use a React component that I remembered because I used it in a different project, you'd have to hope there's a Vue version of that component, or roll your own. A web component you'd just plug and play, no matter the framework.
If you want to use your framework because of whatever reason, you can still leverage web components. Or not. Whichever is fine. You do you.
Additionally; Standards tend to outlive frameworks.
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