To the contrary, it is often the "senior" engineers that refuse to learn new architectures, and only want to build in ways they already know and used in the past.
Senior engineers are more likely to be the ones who have seen how mindless adoption of fad-of-the-day translates to product quality, and are more likely to choose a solution that they have seen actually work, and for which they know the warts and how to handle them. That's a good thing - experienced engineers should be conservative when it comes to code that runs in prod. Customers are not guinea pigs.
