Migrate Your Existing Matrix Account, The Harder but Safe Way!

I love migrating my federated accounts on Mastodon, i have done so multiple times in my years using it. Its painless, its easy, and everything is done for me. Its like magic! So today I decided to also migrate my federated Matrix away from matrix.org, should be just as easy right? From a quick search online, there exists a preexisting solution called EMS Matrix Migration which should work similar to the migration of a mastodon account. But, how they achieve this is by logging into your previous and new account and then running a bunch of commands on your behalf. I do not particularly trust this method, since this would be giving away your password to a third party for a secure messenger protocol! How this is the “official way” is just baffling me. Also there not being an integrated way to do this in Element either, its only available in the paid and proprietary EMS toolbox. So to hell with this solution, lets just do it ourselves. How hard could that be?