Are the labels really all that important? If a picture of the great outdoors also features a recognizable person, is it Landscape, or an Environmental Portrait? If an interior picture of a building's angles and shapes includes a vase on a desk near 3 pieces of fruit, is it Architectural, or Still Life? If 'Street' need not be urban...etc., etc., etc.
Why should we care, let alone argue about it?
Please define 'Blue Chip'. Please define 'Gourmet'.
Subjective shorthand expressions to assist in casual conversation, not terms that require precise specifications.