Building or maintaining a block theme means fighting the file-to-database drift: Site Editor edits are saved to the database and silently override your theme files. WordPress can reset those overrides only one item at a time, through buried menus, and some cleanups (rescanning pattern files, flushing the theme.json cache and OPcache) have no button anywhere.
The Workbench puts the whole development loop in one admin-bar menu:
Safe by design: the Workbench is OFF by default and only appears in a development environment (wp_get_environment_type()), or when you opt in with define( 'BLOCKWRIGHT_WORKBENCH', true ); in wp-config. Every tool is capability-gated and nonce-protected; the one destructive tool requires an explicit confirmation.
Pairs well with the official Create Block Theme plugin: use Create Block Theme to save the changes you want INTO your theme files, and the Workbench to clear out the state you do not want.
Works with any block theme.