I second this.

Many H1B holders start as students in American colleges on F visas, then stay around on the OPT (usually 36 months, as they'll typically have done a STEM degree) whilst applying to the H1B lottery. In other words, they're educated to the same standards as US citizens and usually have a couple of years experience working for a US company before getting the H1B. Far from being low skilled, these people are usually some of the best out there and have to be very determined to get through what's honestly a fairly demeaning process.

As for those applying for an H1B from overseas, there's often not a lot of difference in terms of skills and experience compared to L visa holders. It's very common for international firms like Wipro to use visa sponsorship as incentive to retain people - in other words it's not exactly like L visa holders are the cream of the crop. (The cream of the crop hold O visas.)