What do you think about fact that FBI director will, from now on, likely change instantly with each admin?

FBI director has a term limit of 10 years, but only Mueller served a full term for various reasons. Biden allowed Chris Wray to stay, but Trump instantly fired him, and of course next dem admin will fire Patel, and so on. Do you think it is not really a big deal, like how the CIA director and many other important positions change with every admin, or that it is the issue?