I advocate a co-design of sorts, by working with real, living people instead of personas. Follow them on social media, talk to them, test your assumptions, try to understand them and challenge them to come up with solutions themselves. Only then can you really empathize and come together to create designs that are truly human centered instead of persona centered.
The best thing is of course to have more diverse team members that can come up with solutions that work for everyone, informed by their personal background, identity and life experience.
A good example of why this works is from my personal experience at Unc Inc. There was this client who asked us to remove the contact form from their app, simply because no one in the organization checked the mailbox that these emails were sent to. But for a deaf person, that's a barrier: I have to open my interpreter contact app, enter the number and wait for someone to answer. It’s so much hassle that I often don't feel like doing it at all. Thus it’s not a good idea if accessibility is a strategic goal (and in this case a legal obligation). If I hadn't been on that team, the contact form would have been removed.
It also happens that there are plenty of hearing people who prefer not to call, for example because they (think they) do not master the Dutch language well enough and prefer to use a translation app instead :-)