You beg for acceptance when you need the money. Companies smell your desperation. When you have a job, you can be picky.
But I wouldn’t go out and interview a lot unless I was planning or willing to leave.
But once a year it’s probably a good idea to do it to keep from getting rusty. It also helps keep a healthy perspective that you actually can change jobs if you wanted to.
I wouldn't be in an interview where I'm trying to impress the interviewer because that would imply that I'm shooting in the dark for the job, and I frankly don't have the time for that. Not trying to say my time is oh so special, but I have 4 young kids and a track record.
If I had to find a job today, I would use my network to source opportunities and also would find ways to reach leaders at companies I admire. I'm senior in my career now, but this is what I did when I was at the mid-level, too.