Some counterpoints:

1. There are a number of reasons one might choose C++ that aren't related to low-level performance in almost any application. For a particular web application it may or may not be a good choice, but I wouldn't categorically reject it, even for a class project or assignment web app.

2. Any language or suite of them has whole categories of errors, deficiencies in tooling and other issues that can make it suitable or not in the hands of a given team. C++ has more or fewer of these than other languages depending on the context.

3. This seems to be hurling a pretty broad insult at many C++ developers, and "good" requires context.