First I agree very few OL's have any idea what they want.
However, any law school can and does place students in jobs, but it is a long road. The 9 months after graduation stats are highly flawed. First off you honestly cannot even be employed as a lawyer until 7 months after graduation at least in California where bar results are released in November and very few firms will hire in November or December so realistically it is not until that January when you even have a chance of getting hired, which is 9 months after graduation and odds are many lawyers will do some b.s. thing the first year or two out of law school.
Education however, is a long term investment as you have mentioned in your post you just landed your dream job, but I imagine there was a lot of stress and uncertainty going down that path. Most lawyers however that have practiced that have been licensed for 5 or more years do pretty well for themselves, but getting that first job is a pain in the ass.
However, this is not uncommon to law school.
College grads not finding jobs. http://www.cbsnews.com/news/half-of-college-grads-cant-find-full-time-jobs/
MBA's a bad choicehttp://www.cbsnews.com/news/top-5-reasons-an-mba-is-a-bad-investment/
Nursing grads can't find jobshttp://www.cbsnews.com/news/top-5-reasons-an-mba-is-a-bad-investment/
I could go on and on with articles saying X education is a bad investment. However, the truth is starting out in any profession is difficult. To the best of my knowledge I am not aware of some guaranteed $200k a year cush job waiting for 100% of graduates in any profession. If that exists let me please let me know.
Basically anything is a challenge and there is no easy route. Therefore, if you want to be a lawyer go to school and use common sense when choosing the school you choose.
Law school is a great investment for thousands of students and terrible one for thousands of others. Then these blanket employment stats from schools have little merit to me. Frankly, if your in the bottom 25% of your class at any school, no internships, no mock trial, no nothing then it will be hard to get a job out of law school and probably to even pass the bar.
At the same school another student can finish in the top 25%, have numerous internships, participates in mock trial, heads law review etc likely will find a job, which goes to my overall point that whether you succeed in the legal profession will have a lot more to do with the individual than the school.
I interview people and schools are great, but I look at references, experience, etc. If someone attended Berkeley and had a 2.6, never interned, participated in nothing and showed up 20 minutes late to the interview I am not hiring them.
If another student from Santa Clara comes in with a 3.6, numerous professor references, internship experience, participated in mock trial, comes prepared to the interview etc I am hiring them.
So that goes to the overall crux of OP's question choose the school that fits them best, but if Biglaw is their main goal then sure Penn opens more doors, but is it worth the cost? Maybe, that is for OP to decide, but don't choose anything without thinking of yourself first and foremost.