why not use respectExternal in dts bundle

[10Derozan]

I found tsup use rollup-pluign-dts to finish dts build, and external node_modules in default, but why not use respectExternal, a option of rollup-plugin-dts to bundle our node_module/@types or not tsResolvePlugin? I think this doen't need to handle it yourself. Maybe some reason i don't know, can someone tell me?