How we make cakes with whipped cream

All cake designers in UK offer butter cream or fresh cream as options (extra fee).They say : "whipped cream not working under icing" ..it's true ?...absolutely NOT! They don't know how do it or use cheap ingedients and reason why they can't do it correctly.How we make it ? We don't use cheap/poor butter cream..even don't offer it to our clients....Best quality ingredients + Satin Ice roller foundand = delicious cake and quarrante of unique flavor. See below