Penn has always been the most pre-professional of the ivies, it is like ingrained in its DNA and will be very hard, almost impossible to change. Honestly I think it can be both a bad and a good thing. It means that students at Penn are way more conscious and pressured from very early on to make plans about their summers during college and their career after graduation. Yes without a doubt this adds a lot of pressure and can get overwhelming at times, but it has its positive aspects too namely that it provides a sense of direction and motivation and also toughens the students up and prepares them for the real world. This could be especially beneficial for liberal arts majors.
Penn is not for everyone and it is not a cosy environment where the students will be coddled. In general, students who enjoy and thrive under competition and students who are also social and can juggle intense academics with extracurriculars will tend to enjoy Penn the most.
That said from my experience there has always been help from professors and TAs if you approach them, go to their office hours, and also from your peers both in terms of academics and job search. There are many upperclassmen who take time out of their schedule to prep their underclassmen acquaintances for interviews and give them advice etc. Also for many of my classes students out of their own initiative would form study groups to do the homework problems and even study for the midterms. There is collaboration for sure in addition to intense competition.
Also Penn is big school in a major city, so it can get overwhelming. Finding one or more organizations on campus makes a huge difference in terms of social life and also the help and mentorship one can receive from peers. I would suggest that freshmen and also prospective applicants keep that in mind.
Lastly, as I said Penn is not for everyone. Don’t choose Penn because of the name, it is an ivy etc. The ivy+ schools are very similar in many ways but also have big have differences. While you could feel at home and thrive in one, you could completely not fit into another one.