Apps that I can't get rid of

MacOS High Sierra comes with a helpful tip about 32-bit apps and a warning that future versions of OS X will not support such apps. The helpful tip reads as follows:

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How do I check if an app is 32-bit or 64-bit?

From the Apple menu, choose About This Mac, then click the System Report button. From the system report, scroll down to Software, then select Applications. When you select an individual application, you will see a field titled ”64-bit (Intel)”. “Yes" indicates 64-bit; “No" indicates 32-bit.

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I followed the instructions above and got a list of the apps installed on my computer. It's nice to know which apps are 32-bit and which are 64-bit, but what's more interesting is this appears to be a complete list of all apps on my computer. I'd never seen such a list before.

Looking over the list, I see that many apps are obsolete. Some apps exist only to launch intrusive promotional crap. Many apps are not where the list says they are. I can't get rid of them, because I can't locate them.

Has anyone else run into this problem?