The python3-pip package does not depend on libjs-jquery, fonts-dejavu-core, or libjpeg8. These are indirect dependencies.
Many are not critical, and if you installed with --no-install-recommends, you'd get a more minimal set. You'd probably need to explicitly add some recommended packages that were needed, though.
libjs-jquery was brought in by python3-dev depending on libjs-sphinxdoc, for the HTML documents it includes.
fonts-dejavu-core was brought in by fontconfig-config, via libc-devtools, a recommendation of libc-dev-bin.
libjpeg8 was also comes care of libgd3 and libc-devtools.
The python3-pip package does not depend on libjs-jquery, fonts-dejavu-core, or libjpeg8. These are indirect dependencies.
Many are not critical, and if you installed with --no-install- recommends, you'd get a more minimal set. You'd probably need to explicitly add some recommended packages that were needed, though.
libjs-jquery was brought in by python3-dev depending on libjs-sphinxdoc, for the HTML documents it includes.
fonts-dejavu-core was brought in by fontconfig-config, via libc-devtools, a recommendation of libc-dev-bin.
libjpeg8 was also comes care of libgd3 and libc-devtools.