Why is paid email better than free email?
Free email solutions are often limited – in both what they can do and reliability. They are also not really free, but funded by advertising sponsored services. It means you share a lot (perhaps too much?) about yourself, and can be bombarded with unsolicited content.
You also need to use your own domain for your emails, but most free email solutions can’t offer that option – and Jack@thebakery.co.uk is always better than Jack267652@warm-to-coldmail.com