"_Opportunities_ to avoid an accident"
Driving in the Left lane constantly tends to make people mad. They want to pass you. They will try to pass you on the right, the left, the shoulder... they will cut people off to pass you.
Therefore if you drove in the right (i.e. correct and/or rightmost) lane you wouldn't have all of these "Opportunities" to avoid accidents, because you wouldn't be bombarded by infuriated idiots trying to get around you.
I can see his logic. The more of these "opportunities" you live through the better driver you will become... and if you don't live through them, hopefully you take one (or more) of those infuriated idiots off the road with you. I don't agree with the notion, but after 50 years of teaching brats to drive you would probably develop devious and senile ways of using your driving students as vehicles (pun unintended) for your revenge on society.
Drive in the correct lane... it's safer, even if you don't get the experience of avoiding accidents all the time.
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There is another point to be made here. Let's say the cost of this "mat" is $2000 USD and it produces 1mw per footstep (purely examples to illustrate a point, I don't know the cost or the energy-generating potential per impact).
If I were to install this in my entryway and I estimate about 50 footsteps on this mat on average (probably high but makes the math easy), at $0.032 USD per KWh it would take 197,129 years to pay for that $2000 mat.
However, if you consider a subway station would have millions of foot impacts per day that number comes down quickly. For example 1 million footsteps per day makes it under 10 years for ROI on the theoretical system.
The efficiency of this system, and therefore the ROI on the system is directly proportional to the scale of the installation and the amount of usage.
(I know my calculations are not rigorous, but then again I'm pulling all of the numbers out of
Chemist who falls in acid will be tripping for weeks.