135 - I didn't see a 135?
Without seeing the LZ from the air, it is difficult to determine if the "very professional pilot" had any alternative approach paths. On 'most' occasions, HEMS pilots choose well, but not always.
The one he/she finally selected did, however look precarious and if the donk stopped over the top of those rooftops, I wonder how his/her defence would survive scrutiny in a coroners court.
IE: Flying in to save one life but losing several if the helo lands on a house.