Why can't I change plans online?

I've gone through this process at least once a year since I've had service at my current address. So, since mid-2014, do the math. Every single time I get a message:

"We couldn't find what you are looking for. Please call 1-800-XFINITY and one of our friendly and knowledgeable representatives can help."

Is there ANY chance this system will EVER work? I see from searching the forums that I am far from alone. I don't have the time (or inclination, really) to go over on the phone the complexities of your plans and offerings with your service rep every time my contract expires or new offerings come around. Even "over chat" isn't an option which means I MUST take my time to address the issue via a phone call with a person who has to use the slowest, most error-prone-possible means to convey information to me to make a decision.

If you can't supply the information online, stop offering it at all and just tell me I have to call. The utter lack of this capability in 2023 from a company that claims to be at the forefront of data and entertainment delivery really comes across like you're unwilling to put anything in writing, trying to make it intentionally obfuscated, or just hoping I'll throw my hands up in frustration and blindly pay my bill.