Embedding webform on a node/user page as a field (solved!)

I've spent several days scouring the web and forums for a method to do one simple task - embed a personal contact form (or webform) onto the actual user's page instead of making visitors click a separate link to another page.

This is the one method I've tried that actually works, so I thought I'd make a post to hopefully make other's lives simpler/easier/harder/faster/better/stronger as well.

Some other articles I read that did not result in a success for various reasons:

• Drupal 8 Webform Module: How to Add a Webform to a Content Type
• How to make a user contact form part of a field group
• How do I Embed a Form In a Page in Drupal 8?
• Drupal 8 : Inject a contact form inside a content type in 5 steps - comments discuss using (unable to use) for personal contact forms
• Updated >= Drupal 8.0.5+: Rendering forms/entities programmatically on theming level

The only issues I have with this solution are that it requires 4 modules to work - Webform, Extra Field Settings Provider, Extra Field, and Webform Extra Field. Supposedly this should be much simpler by using an alter hook to embed the existing personal contact form, but I wasn't able to get a custom hook solution to work.