Just look at this recumbant design with the kevlar shell.  So if this biker can go 82 mph, why can't we ride our 750 watt battery electric assisted velomobiles around town and cruise safely inside a kevlar shell right along with traffic?

Because they aren't being mass produced and marketed.  People are making/riding them though.  Why drive a 2 ton wheelchair that makes you and the climate sick and sends all our money to the exxonmob and OPEC?