> Clear cutting is actually a good method of logging

You're right - it's a fantastic method of logging. It's not however an ideal method of forest management for diversity and ecosystem services. It mimics large scale disturbance events (e.g. fire, major windthrows) in some ways (large scale tree removal).

However, it is also significantly different than those events in that it removes more of the larger biomass from the landscape (fires tend to burn off only fine fuels), reducing the organic materials left on site. It also removes local seed sources, forcing replanting as the only option for regrowth in the short-term.

Additionally, clear cutting involves the use of machinery that can compact and damage the soil, often by design. Remaining biomass is moved into piles and the soil surface is scrapped into windrows to facilitate growth of new seedlings. This continued removal of organic materials and soil damage can lead to longer-term depletion of organic matter and nutrients from soils and compaction, affecting its hydraulic properties and capacity for carbon storage and long-term productivity.

These areas are then replanted as a monoculture and typically sprayed with herbicides to reduce competition. While it's often the case that these forests tend to regenerate in even-aged patches dominated by one species, this only exacerbates this effect and reduces understorey diversity as well.

Clear-cutting isn't all bad, but it certainly isn't a "good" method of silviculture from an ecological perspective. Many countries having been shifting to a model that is closer to a partial-harvest, with the intent of increasing diversity on the landscape, which is demonstrated to improve forest ecosystem resilience to disturbance and climate change.